I'm sure this is an easy fix, but I'm not sure what to do. I plug my Touch into my USB dock cable and it lights up because the battery is charging, but it doesn't get recognized by iTunes, and isn't syncing. It used to work great and now it's not. I've tried unplugging and replugging the usb cable, trying different usb ports, tried shutting down and rebooting, etc, but nothing. In System Profiler, it shows the ipod touch connected under USB devices, but iTunes doesn't 'see' it. I'm running Leopard 10.5.2, if that is any use. What completely obvious step am I screwing up?